Drawing frame for spinning machines



Aug. 31, 1937.

F. KRAFFT DRAWING FRAME FOR SPINNING MACHINES Filed Jan. 14,1952 2Sheets-Sheet 1 it Patented Aug. 31, 1937 t I 2,091,822

UNITED sTArEsgrATENT oFFlcl:

DRAWING FRAME FOR SPINNING MACHINES Fritz Krafit, St. Blasien, Germany,assignor to Anna Kym-Krafit and Elizabeth Kym, both of Schopfheim inBaden, Wiesenthal, Germany Application January 14, 1932, Serial No.586,662

In Gelnlany May The present invention relates to a drawing The'inventionis illustrated by way of example frame for spinning machines such asring spinin the accompanying drawings, wherein:- nir g machines andmules, and particularly resides Figure 1 shows a vertical section'of adevice therein that in the main draft field, and followaccording t ePresent inventioning a positive nipping point there is provided avFigure 2 is a P Of t lower portion of a y elding drawing device at sucha short distance device according to Figure 1 after removal of the fromthe stationary nipping point that the dispp p v tance between thepositive nipping point and the F g e 3 Shows a portion f Figure 1 withyielding drawing aggregate device is less than d t la the length of thestaple to be operated upon. Figure 4 iS a w Of the rollers 76, i inFigure 3 10 The invention further relates to the particular en m theright, d construction and arrangement of the feed de- Figure 5 iS across Section Of two Tellersvice. Further, the invention particularlyresides v the drawings a is a trough of w ch the Point therein that theyielding aggregate i 0 111 extends some distance upwardly. b is a ribbed15 structed that the free distance between the posi- Teller driven fromthe m drive d O wh ch 15 tive nipping point and the point. which issubthe Shape Conforms with the trough up to t jected to yieldingpressure varies during the qpoutlet point m; The trough is provided withside oration,wherebythe'lower portion of the yielding cheeks 2 whichembrace the bb d roller 17 drawing aggregate is preferably fitted; ith pfrom the sides so that the material cannot be 20 lee ing edges or ribs,which may also b corru, v pressed out laterally. c is a roller providedwith 20 gated. These projecting edges may, for example, htly C mbtoothedribs 01 which P- be formed by a rotary polygon of which th edges eratewith an endless leather band d passing over may also'be so constructedthat in the operating a I which is driven d p y 0n th field transverselyto the direction of operation movement of the roller 9 and v de e ers Ithey deviate from a continuous straight line in Q 92, and which iscaused to P as far as 1 that for example they are constructed spirally,are Sihle around the roller f y further pl r h of located at an anglerelatively to one another or u t i and k indieete a front p of rollersthe like. The yielding pressure device may prefarranged Very 01058 tothe rollers f, the erably be made variable in tension. Further, it tamebeing less than inch preferably less 3 may be so constructed that it canbe disposed than its inch as Shown 1111 the d w s- T e ore or lessaround the polygon. Pr f r l t roller k is formed of rubber covered withleather. yielding pressure device of the yielding aggregate is an pp n alower weed clearer roller P is driven positively, for example by thedrive of v d d w a p v n In front of t the portion of this pressureaggregate which does front roller p k, i is provided a p e guidnotyield. The upper and lower rollers. of the ing device (Figures 3 andconsisting of wo 35 front roller pair may preferably be approachedparts 1. 02 which are y means of guiding so closely to the upper andlower portion of the faces 04, 5, 03, adapt to guide the fibers t0 8yielding aggregate that any adherin or floating point of the line ofcontact between the rollers threads are removed from the yieldingaggregate. k and These members at h ends of h r l rs Guide members mayalso be provided between f, 76 conform with the periphery these theyielding aggregate and the from; roller pair rollers and are thenreduced from the ends of which are capable of guiding the loose or flati g the rollers O, f towards the middle Of the 11118 Of fibres towardsth middle of the m, roller Pam contact between the rollers k, i, in sucha manthese guide members preferably leaving between net that they arehere directed .towards f them a small free space. .These guide membersother by means of a Small Somewhat ,tnangular may at their ends be madeto conform with the surface 03 extending parallel to the direction ofperiphery of the drawing roller or the like which the thread whilstleavmg Satan slot The surrounds them. The pressure roller of the front pbetween the two miners 1S capable of roller pair may Preferably besurrounded by a kiwlpg thre.ad to pass q 15 a weight loaded ten- 61 dingmass and be provided with an intern 1 slomng device for the roller g1;and thus for the a leather band (i. r is a tensioning device for thebush which the point through wmch ethe upper roller k of'the frontroller pair. The path thread Passes hes a Slight. e ei e of the materialis indicated by the broken line 8 yielding ma may for example ehhsist ofrubber and the arrows. The roller 11 is adapted to fit which is coveredwith leather. into the trough a in such a manner that the ma.-

, 20 c approach the point 111.

Adjacent the guide roller 92 are shown arrows which are curv d aroundthe centre of the ribbed roller b. These arrows are adapted to .indicatethat the guide roller m is capable of adjustment 15 along such an arc.In this manner there is obtained that the leather band d can bear fordifferent distances against the roller 0.

the roller 572 is lowered the more closely will the nipping pointbetween the band (I and the roller The distance between the point a1 andthe first contact point between 1. In a drawing frame for spinningmachines in a main drawing field an aggregate adapted yielding drawingaggregate.

2. In a drawing frame according to claim 16, wherein the trough-shapedreceiving device has periphery .of the feed roller.

3. In a drawing frame according to claim 16, wherein the trough-shapedreceiving device has extends tangentially to the periphery of the saidroller.

5. In a drawing frame according to claim 1, the aggregate producing'apositive nipping consisting of a trough-shaped receiving device incombination with a rotary feed roller, and extensions on 'thesaidreceiving device adapted to partly enclose the said feed roller at itsend surfaces.

6. In a drawing frame according to claim 1, the

7. In a drawing frame according to claim 1, the construction of theyielding aggregate as a rigid ers around which said band is passed.

. In a drawing frame according to claim 1, the

construction of the yielding aggregate as a nontion to a larger orsmaller extent.

10. In a drawing frame according to claim 1,

' in position relatively to the said lower roller.

4 12. In a drawing frame according to claim 1. the construction of theyielding aggregate as a positive nipping aggregate is less than thelength of staple to be operated upon, and a front roller pair locatedbehind the yielding drawing aggregate in the direction of operation,said front roller pair being arranged so closely to the upper and lowerportion of the yielding aggregate that it is capable of taking-up,adhering and floating fibers from the yielding aggregate.

i i. In a drawing frame for spinning machines, an aggregate in a maindrawing zone which is adapted to produce a positive nipping at a nippingpoint, a yielding drawing aggregate located. behind the first mentionedaggregate in the direction of operation at such a distance therefromthat the distance between a clamping point of the yielding aggregate ndthe clamping point of the positive clamping aggregate is less than thelength of staple to be operated upon, a front roller pair located behindthe yielding aggregate in the direction of operation, said front rollerpair consisting of upper and lower rollers, of which the upper roller issurrounded by a yield- .ing mass such as soft rubber and at the point atwhich the fibres pass is provided with a slight enlargement.

15. In a drawing frame according to claim 14, a cover of leather aroundthe yielding mass.

16. In a drawing frame for spinning machines, in a ,main drawing fieldan aggregate adapted to effect a positive nipping at a nipping point, ayielding drawing aggregate located in the direction of operation behindthe first mentioned aggregate at such a distance that the distance ofone nipping point of the yielding aggregate from the nipping point ofthe positive nipping aggregate is less than that of the length of stapleto be operated upon, the aggregate producing a positive nippingconsisting of a trough-shaped receiving'device in combination with arotary feed roller, the yielding drawing aggregate containing a rotatingpart adapted to constantly vary the said distance during the working ofthe yielding drawing aggregate.

1'7. In a drawing frame, according to claim 1 the aggregate producing apositive nipping consisting in a trough-shaped receiving device incombination with a rotary feed roller, said device having an extensionon which the material to be treated leaves said device, the otheraggregate comprising a lower roller, and said extension lyingsubstantially lower than the upper portion of the said lower roller.

18. In a drawing frame according to claim 14, around said yielding massa cover of heavier consistence than soft rubber.

19. In a drawing frame according to claim. 1, said drawing aggregatehaving a lower portion and an upper portion, the aggregate producing thepositive nipping being formed as a troughshaped receiving device and arotary speed roller and a bearing for the last mentioned aggregateat'such a low position that the lower portion of the yielding aggregatecan engage after a short distance with the roving leaving the saidpositive nipping aggregate.

20. In a drawing frame according to claim 22, projecting ridges beingprovided with cornb-like corrugations arranged substantially parallel tothe direction of operation,

21. In a drawing frame according to claim 22,

a drawing aggregate producing a positive nipi ping, the parts of thesaid ridges having a dinerent spacing from the nipping line of the saidaggregate producing a positive nipping.

22. In a drawing frame, a yielding aggregate .comprising a roller andridges on said roller projecting transversely to the operating directionand having a distance from each other essentially greater than threetimes the breadth of a said ridge. FRITZ KRAFFI.

